*{
    margin:0;
    padding:0;
}
.first-background{
    width: 100%;
    background-image: url("../image/background_two.jpg");
    background-repeat:no-repeat;
    background-size: cover;
    -moz-background-size:cover;
    -webkit-background-size:cover;
    zoom:1.4;
}
.logo{
    margin-top:5%;
    margin-left:6%;
    width:15%;
}
form{
    text-align:center;
    margin-top:15%;
}
input{
    width:70%;
    height:3rem;
    border-radius: 1.5rem;
    text-align:center;
    margin-top: 10%;
    border:none;
}
.p-undraw{
    margin-top: 30%;
    text-align:center;
}
.undraw{
    width:24%;
    text-align:center;
}
.black_bg_all{
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.5);
    position:fixed;
    top:0;
    left:0;
    display:none;
    text-align: center;
}
.five{
    width:80%;
}
.cha{
    margin-right: -70%;
    margin-top:30%;
}
.cha-img{
    width:6%;
}